Journal of Drug Abuse Open Access

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Abstract

Association between findings of Cardio-Pulmonary Exercise Teston the treadmill and stationary cycle in patients with severe heart failure

M.Nazarieh

PeakVO2 is one of the most practical findings during cardiopulmonary exercise test (CPET), that plays an important role in determining prognosis and need for heart transplantation.Considering the well-known association between different parameters of CPET and prognosis in patients with advanced heart failure (EF≤35%), evaluation of these indexes,by CPETcan be performed on treadmill or bike, which has both advantages and disadvantages.There are small studies on this subject of comparing the findings between these two methods.
Methods and Materials ; 30 stable patients (average age:40.57+- 12.46, average Hight:172.15+-8.61) with severe heart failure (EF≤35% ) who had been diagnosed for at least one year were enrolled in thestudy. They were not candidate for more special interventions other than heart transplantation, and they didn’t have any history of advanced pulmonary disease.The patients were excluded from the study if there was a musculoskeletal disease that prevented proper testing. After familiarizing the patients with the test method, the CPET test was done randomly on a stationary cycle and treadmill for two separate days with a minimum and maximum of 24 to 72 hours.For the bicycle protocol, we used a 5w/m to 25w/m and for a treadmill, the ramp protocol was used with an increase of 0.3km/hr/min and a slope of 0.5% per minute for a minimum of 5 minutes.The parameters obtained from a CPET on a stationary bike and treadmill were gathered and analyzed